Function haskell_bits::functor::fmapconst

pub fn fmapconst<TCon: ?Sized, TIn, TOut: ?Sized, X>(
    e: &TOut, 
    x: &X
) -> <TCon as WithTypeArg<TOut>>::Type where
    TCon: Functor + WithTypeArg<TIn> + WithTypeArg<TOut>,
    TOut: Clone,
    X: TypeApp<TCon, TIn>,